#!/usr/bin/env python
#  Copyright (c) 2010
#  The Regents of the University of Michigan
#  All Rights Reserved

#  Permission is granted to use, copy, create derivative works, and
#  redistribute this software and such derivative works for any purpose,
#  so long as the name of the University of Michigan is not used in
#  any advertising or publicity pertaining to the use or distribution
#  of this software without specific, written prior authorization. If
#  the above copyright notice or any other identification of the
#  University of Michigan is included in any copy of any portion of
#  this software, then the disclaimer below must also be included.

#  This software is provided as is, without representation or warranty
#  of any kind either express or implied, including without limitation
#  the implied warranties of merchantability, fitness for a particular
#  purpose, or noninfringement.  The Regents of the University of
#  Michigan shall not be liable for any damages, including special,
#  indirect, incidental, or consequential damages, with respect to any
#  claim arising out of or in connection with the use of the software,
#  even if it has been or is hereafter advised of the possibility of
#  such damages.

import rollup_hops

import cPickle
import sys

def rollup(data):
  unique_kv_pairs = None
  for idx, hop_unique_kv_pairs in enumerate(data):
    if idx == 0:
      unique_kv_pairs = hop_unique_kv_pairs
      continue
    for key in hop_unique_kv_pairs:
      if key not in unique_kv_pairs:
        unique_kv_pairs[key] = hop_unique_kv_pairs[key]
      else:
        unique_kv_pairs[key].update(hop_unique_kv_pairs[key])
    print 'Finished %d' % (idx+1)
  return unique_kv_pairs

if __name__ == '__main__':
  if len(sys.argv) < 3:
    print 'Usage: %s file_to_roll file2_to_roll ... target_file'
    sys.exit(1)
  data = (cPickle.load(open(filename)) for filename in sys.argv[1:-1])
  results = rollup(data)
  print 'Global stats:'
  cPickle.dump(results, open(sys.argv[-1], 'wb'))
